New Smallest Cabooses I've Seen
the Pennsylvania Railroad did unique (and straightaway recognizable) things, similar this caboose on a freight almost Salem, Ohio. And how many other railroads would laissez passer a caboose a release similar "477873"? March 1971
http://www.twinplanets.com/rr/slides/S_PRR_OH.SA__71.03.31.11_L.html
